Improvement in valves for oil-tanks



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1NVENTQRS MMM WITNESSES.

N. PETERS, FHOTO-LITHQGRAPHER, WASHINGTON D C,

timid finite fl unt DANIEL FISHER AND -W1 L1AM OUMMING OF 01 o'rrv,

PENNSYLVANIA.

Letters Patent No. 113,153, dated March 28, 1871.

lMPROVEMENT lN VALVES .FOR OIL-TANKS- The Schedule referred to in these Letters Patent and making part of the same.

Natal/re and Objects of the Invention.

Our invention relates to valves for oil-tanks, especially railway-car tanks, and hasvfor its primary objects the adaptation of the same for the application of steam or hot Water to thaw them loose in winter, and their adaptation further to be lifted through ice without danger of breakage.

The features of novelty are- First, a tubular valve and valve-stem,,forming', in connection with the valve-seat, a continuous channel through which steam or hot water may be passed.

Second, a combined valve and val ve-stem with plane vertical sides, so that it may be drawn through'any ice which may cover the oil.

Third, a seat for such tubular valve, constructed with guides to support the .same against lateral deflection. v

Fourth, a threaded sleeve, provided with a handwheel, and working between a pair of adjustable collars on the valve or valve-stem, in a combined nut and stop, as means for operating such valve.

Description of the Accompanying Drawing. The several figures are viewsol a cylindrical oiltank provided with our improved valve.

Figure 1 isavertical transverse section on the lines z z, figs. 2 and 3.

' Figure 2 is a plan view.

Figure 3 is a horizontal section on the'line y y.

Like reference letters indicate corresponding parts in the several figures.

General Description.

In the bottom of the tank A we form an aperture, 11, and over the same another, b, which may be larger than the first, strengthening the-two by exterualrims,

- little additional diificulty;

of the tank, constitutes the valve or valve and stem, its end being suitably fitted and ground to the seat D The valve F is threaded at its upper end, and has attached thereto a loose sleeve, G, by collars H I on said threaded portion, the lower or both of-said collars being lookedby keys f.

The lower end of said sleeve G-is threaded for engagement with the nut E, and its upper end provided with a hand-wheel, g.

A recess, h, in the lower surface of..th e nutE, receives the lower collar '1 to stop the lift of the valve.

This and other etails of construction may obviously'be varied.

' In applying the valve, the lower collar I is first applied, then the sleeve G, with the nut .E thereon, and, lastly, the collar H.

The nut E is then screwed home and the valve closed by turning the hand-wheel 9.

Operation and Advantages.

The valve being closed, the tank is filled through another passage. The valve is thus always empty.

To withdraw oil, the hand-wheel g is turned and the valve lifted by a straight and powerful pull imparted by, the screw-sleeve G through the collar H.

The collar- T, abutting against the nut E, stops this motion while the lower end of the valve is still-within the guide-lingers'e, which thus preclude its lateral deflection.

A pipe may be attached to the stem d of the valve-seatD, to conduct the oil where required.

Should thevalve be frozen, a continuous and clear channel is furnished by the valve and its seat, and,

7 by passing steam or hot water through this, the ice may be instantly melted and the valve opened with now in use, the valve can only be thawed with great difficulty and at considerable expense in time and labor, heating the oil being sometimes resorted to.

' Should there be ice in the car, the smooth side's-of the valve will readily break loose therefi'on and there is nothing to be broken in the act, while the valves now'in useare often broken or pulled from their stems in attempting this.

When the valve is lifted a clear outlet is furnished,

which may be of such large area that the oil may be-;'

drawn ofi' thereby in as many minutes as iu-said-comnon valves hours are required.

whereas, with the valve Claims.

We claim as our invention- 1. The tubular valve 13, constructed substantially as herein described, permitting the passage of steam or hot water within it when closed upon its seat, for the purpose specified. c

2. The combined hollow valve and valve-stem F, constructed with plane parallel sides, as herein set forth, for the purpose stated.

3. The valve-seat D, constructed with guide-fingers 0r wings e, as and for the purpose setforth. 

